ICP 40VA Transformer for WJH330000KTP0A2 – 208/230 to 24V | Ships Today

Overview

This is a genuine OEM 40VA control transformer (Part #1173691) for the ICP/Tempstar/Heil WJH330000KTP0A2 heat pump. The transformer steps the 208/230V line voltage down to the 24V used by the thermostat, control board, contactor coil, and reversing-valve coil. Without correct 24V output, the entire low-voltage control circuit goes dead — the system won't respond to thermostat calls and the contactor and reversing valve cannot energize. This combination listing covers the related 24V control components for the WJH330000KTP0A2, including the reversing-valve coil and barrier hardware.

Specifications

Compatibility

Factory-correct 40VA control transformer for the ICP/Tempstar/Heil WJH330000KTP0A2, and a direct replacement across ICP-family heat pumps and condensers using a 208/230V-to-24V 40VA transformer. Confirm your primary/secondary voltages and VA rating before installing.

Installation Guide

1. Safety First – Disconnect power at the disconnect and breaker, then verify zero voltage with a multimeter.
2. Access – Remove the unit's electrical access panel.
3. Document – Photograph the primary and secondary wiring before disconnecting.
4. Remove – Disconnect the line-voltage primary leads and the 24V secondary leads, then unbolt the old transformer.
5. Install – Mount the new transformer, wire the 208/230V primary and 24V secondary to the matching terminals per your photo.
6. Test – Restore power and verify 24V output at the secondary and proper control response on a thermostat call.

Signs You Need a Replacement

• No 24V control power — thermostat and system are unresponsive.
• Contactor or reversing valve coil won't energize.
• Burnt smell, scorched windings, or visible overheating on the transformer.
• Blown low-voltage fuse that recurs after replacement.

Shipping & Returns

Ships same day before 3 PM CST. 30-day returns. Backed by the National HVAC Parts fitment guarantee.